Thank you for your question.
This bump can be a Vascular Malformation
These are improperly grown blood vessels that get entangled and cause a swelling.
of the head with STIR protocol
will be able to differentiate it between a Slow Flow and a High Flow Vascular malformation.
This can be treated appropriately depending on what it is on the MRI.
Slow flow malformations are typically soft and non pusatile and can be treated by percutaneously injecting Sclerosing Agents like Sodium Tetradecyl Sulphate.
High flow malformations would be pulsatile to touch and would need an intra arterial embolization followed by surgical excision.
or Embolization is done by a Vascular Interventional Radiologist
Consultant Vascular Interventional Radiologist